"RESUMING..." shows up whenever I unlock the phone

Woah this is unbelievable. Whenever I unlock my phone, there is this black screen that shows up and then it will say "resuming..." for about a second and then after that the lock screen will show up. In short, I have to wait for about 2 seconds for the lock screen to show up!

What the hell is happening?? Is this because of the Battery Saver live tile? This happened right after I updated my phone...

This might be due to too many folders and live tiles on your start screen! I was facing this prob too! I uninstalled some of the unused apps! Unpinned some tiles! And removed some folders! This is basically ram or memory issue! Or you could be using live lock screen! It could also be the reason! M sure you are using low end 512 mb ram phone! Try the unpinning some stuff! It would help!